40152731 has 2 divisors, whose sum is σ = 40152732. Its totient is φ = 40152730.

The previous prime is 40152703. The next prime is 40152811. The reversal of 40152731 is 13725104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40152731 - 2²² = 35958427 is a prime.

It is a super-2 number, since 2×40152731² = 3224483613516722, which contains 22 as substring.

It is equal to p_2442380 and since 40152731 and 2442380 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 40152697 and 40152706.

It is not a weakly prime, because it can be changed into another prime (40152131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20076365 + 20076366.

It is an arithmetic number, because the mean of its divisors is an integer number (20076366).

Almost surely, 2^40152731 is an apocalyptic number.

40152731 is a deficient number, since it is larger than the sum of its proper divisors (1).

40152731 is an equidigital number, since it uses as much as digits as its factorization.

40152731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 40152731 is about 6336.6182621332. The cubic root of 40152731 is about 342.4299137320.

Adding to 40152731 its reverse (13725104), we get a palindrome (53877835).

The spelling of 40152731 in words is "forty million, one hundred fifty-two thousand, seven hundred thirty-one".